code: def __post_init__(self):
      tokenizer_kwargs = self.tokenizer_kwargs or {}
      self.tokenizer = AutoTokenizer.from_pretrained(
          self.backbone, use_fast=True, **tokenizer_kwargs
      )
  
file_path: lightning-flash/src/flash/core/integrations/transformers/collate.py
imports: from dataclasses import dataclass, field
  from typing import Any, Dict, Optional
  import torch
  from flash.core.data.io.input import DataKeys
  from flash.core.utilities.imports import _TRANSFORMERS_AVAILABLE
label_desc: Use image node_id 1 for calling the TransformersCollate obj's underlying member method code with example usage: obj.__post_init__() without return types